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Expected Value Calculator

Expected Value (EV) tells you whether a bet is profitable in the long run. Enter your win probability, odds, and stake to see your EV per bet, EV percentage, and projected long-term profit.

Win Probability (%)

Odds (decimal)

Stake ($)

EV per Bet

+$15.50

EV %

+15.5%

Win / Loss

+$110.00/-$100.00

Profit per 100 Bets

+$1550.00

+$15.50 × 100 bets

Kelly Criterion Calculator

Calculate optimal bet sizing using the Kelly criterion. Get full, half, and quarter Kelly stakes for any bet.

Arbitrage Calculator

Detect arbitrage opportunities between two bookmakers and calculate optimal stake allocation.

What is Expected Value (EV)?

Expected Value is the average amount you can expect to win or lose per bet if you placed the same bet many times. A positive EV (+EV) means the bet is profitable long-term. Smart bettors only place +EV bets consistently.

Formula: EV = (Win Probability × Odds) - 1. Multiply by stake for dollar EV.

Want automated edge detection?

OddsLab runs these calculations on every market across 21+ sports, automatically finding +EV bets and Kelly-optimal stakes in real time.

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